Bones returns tonight for its spring premiere, kicking off with the 15th episode of the fifth season entitled "The Bones on a Blue Line." This week's case involves a subway train accident caused by 60,000 gallons of flood water, which consequently results to the discovery of a partially skeletonized body from the overflow.
Unfortunately, Dr. Sweets was one of the passengers on the derailed train so he's now struggling with post traumatic stress, while his near-death experience drives him to make a drastic decision. The rest of team, on the other hand, are focusing on the victim, who is later identified as Martin Aragon, a professional ghost writer involved in a deadly love triangle. Booth and Brennan then question people who they suspect are involved with the case, including a pawn shop owner (James Madio) and subway worker McKenna Grant (guest star Clea Duvall).

Official Photos from the Bones Episode "The Bones on a Blue Line"

Perhaps the most interesting thing about tonight's episode is the release of Brennan's second book, which has everyone tingling. But first Brennan must accommodate a nosy reporter named Riku Iwanaga (guest star Seiko Matsuda).

Video Sneak Peek: The Bone of Contention

(Image courtesy of FOX)